crawljax click ajax button

When I use the crawljax to crawl the ajax web page , I encounter some difficulties which is how I use the crawljax to click the button which is the ajax button. For example ,there are two pictures. I want to use the crawjax to click the booking button（named 订票）to go into the two picture,than I want to use the craljax to click the yellow booking button(named 预订). My question is that how  the craljax  can do the task. Thanks  very much
![qq20131108093904](https://f.cloud.github.com/assets/5170424/1497763/9d9338a8-4816-11e3-8109-c3c9b84c56e5.jpg)
![qq20131108093910](https://f.cloud.github.com/assets/5170424/1497766/aa892efa-4816-11e3-9512-1d403c9fa08d.jpg)